31131431412311 has 16 divisors (see below), whose sum is σ = 31829147873280. Its totient is φ = 30435204744960.

The previous prime is 31131431412307. The next prime is 31131431412317. The reversal of 31131431412311 is 11321413413113.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31131431412311 - 2² = 31131431412307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31131431412317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171518375 + ... + 171699783.

It is an arithmetic number, because the mean of its divisors is an integer number (1989321742080).

Almost surely, 2^{31131431412311} is an apocalyptic number.

31131431412311 is a deficient number, since it is larger than the sum of its proper divisors (697716460969).

31131431412311 is a wasteful number, since it uses less digits than its factorization.

31131431412311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185494.

The product of its digits is 2592, while the sum is 29.

Adding to 31131431412311 its reverse (11321413413113), we get a palindrome (42452844825424).

The spelling of 31131431412311 in words is "thirty-one trillion, one hundred thirty-one billion, four hundred thirty-one million, four hundred twelve thousand, three hundred eleven".